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1、BRITISH STANDARD BS EN 682:2002 Elastomeric seals Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids The European Standard EN 682:2002 has the status of a British Standard ICS 23.040.80; 83.140.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY C
2、OPYRIGHT LAW BS EN 682:2002 This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 28 March 2002 BSI 28 March 2002 ISBN 0 580 39273 2 Nati
3、onal foreword This British Standard is the official English language version of EN 682:2002. Together with BS EN 681-2:2000 this publication supersedes BS 2494:1990 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/70, Elastomeric seals for joints i
4、n pipes, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Ca
5、talogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for thei
6、r correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; m
7、onitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates wh
8、en the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 682 February 2002 ICS 83.140.50 English version Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon
9、 fluids Garnitures dtanchit en caoutchouc - Spcification des matriaux pour garnitures dtanchit pour joints de canalisations et des raccords vhiculant du gaz et des fluides hydrocarbures Elastomer-Dichtungen - Werkstoff-Anforderungen fr Dichtungen in Versorgungsleitungen und Bauteilen fr Gas und flss
10、ige Kohlenwasserstoffe This European Standard was approved by CEN on 16 November 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists
11、 and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsib
12、ility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Ne
13、therlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means rese
14、rved worldwide for CEN national Members. Ref. No. EN 682:2002 E EN 682:2002 (E) 2 Contents page Foreword. 3 1Scope. 4 2Normative references. 5 3Classification. 6 4Requirements 6 4.1Materials 6 4.2Finished seal requirements. 6 4.2.1Dimensional tolerances . 6 4.2.2Imperfections and defects. 6 4.2.3Har
15、dness 7 4.2.4Tensile strength and elongation at break 7 4.2.5Compression set in air. 7 4.2.6Accelerated ageing in air. 7 4.2.7Stress relaxation in compression. 7 4.2.8Volume change in liquid B. 8 4.2.9Volume change in oil 8 4.2.10Ozone resistance 8 4.2.11Compression set at - 15 C 8 5Test pieces and
16、temperature. 10 5.1Preparation of test pieces 10 5.2Test temperature. 10 6Factory production control 11 7Factory product control tests 11 7.1Sampling 11 7.2Routine tests. 11 7.3Type tests 11 8Storage. 11 9Designation . 12 10Marking and labelling. 12 Annex A (informative) Guidance on storage of seals
17、. 13 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive 14 Bibliography. 18 w w w . b z f x w . c o m EN 682:2002 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 208 “Elastomeric seals for
18、 joints in pipework and pipelines”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2002, and conflicting national standards shall be withdrawn at t
19、he latest by November 2003. No existing European Standard is superseded. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directiv
20、e(s), see informative annex ZA, which is an integral part of this standard. This European Standard is based on ISO 6447 and ISO 6448, bringing together the requirements for seals used in gas and hydrocarbon fluid applications. The major changes from ISO 6447 and ISO 6448 have been to introduce addit
21、ional test requirements e.g. an ozone test and to modify some requirements. Finished joint seals have been classified according to their final application and operating temperatures. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries ar
22、e bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. w w w . b z f x w . c o m EN 682:2002 (E) 4 1 Scope
23、This European Standard specifies requirements for elastomeric materials used in seals for supply pipes and fittings, ancillaries and valves at operating temperatures in general from - 5 C up to 50 C and in special cases from - 15 C up to 50 C, for the following: General applications (see Table 4, ty
24、pe G) a) gaseous fuel (manufactured, natural and liquefied petroleum gas LPG in gaseous phase); b) hydrocarbon fluids with aromatic content up to 30 % (V/V), including LPG in liquid phase. Special applications (see Table 4, type H) Materials suitable for carrying gaseous fuels containing gas condens
25、ates and hydrocarbon fluids of unrestricted aromatic content. General requirements for finished joint seals are also given; any additional requirements called for by the particular application are specified in the relevant product standards taking into account that the performance of pipe joints is
26、a function of the seal material properties, seal geometry and pipe joint design. This European Standard should be used where appropriate with product standards which specify performance requirements for joints. This European Standard is applicable to joint seals for all pipeline materials including
27、iron, steel, copper and plastics. In the case of composite seals requirements in 4.2.8 and 4.2.9 apply only when the materials used for any elastomeric parts come into contact with gaseous fuel or hydrocarbon fluid. Elongation at break, tensile strength, compression set and stress relaxation require
28、ments for materials of hardness categories 80 and 90 apply only when they constitute that part of the seal which participates directly in the sealing function or in long term stability. This standard is not applicable to the following: a) seals made from cellular materials; b) seals with enclosed vo
29、ids as part of their design; c) seals with requirements of resistance to flame or to thermal stress; d) seals which contain splices joining pre-vulcanized profile ends. w w w . b z f x w . c o m EN 682:2002 (E) 5 2 Normative references This European Standard incorporates by dated or undated referenc
30、e, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporate
31、d in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). ISO 37, Rubber, vulcanized or thermoplastic Determination of tensile stress strain properties. ISO 48, Rubber, vulcanized or thermoplastic Determination of hardn
32、ess (hardness between 10 IRHD and 100 IRHD). ISO 188:1998, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests. ISO 471, Rubber Temperatures, humidities and times for conditioning and testing. ISO 815, Rubber, vulcanized or thermoplastic Determination of compression set
33、at ambient, elevated or low temperatures. ISO 14311, Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 1: static strain test. ISO 1817, Rubber, vulcanized Determination of the effect of liquids. ISO 28591, Sampling procedures for inspection by attributes - Part 1: Sampling scheme
34、s indexed by acceptance quality limit (AQL) for lot-by-lot inspection. ISO 33021, Rubber Tolerances for products Part 1: Dimensional tolerances. ISO 3384:1999, Rubber, vulcanized or thermoplastic Determination of stress relaxation in compression at ambient and at elevated temperatures. ISO 3951, Sam
35、pling procedures and charts for inspection by variables for percent nonconforming. ISO 46611, Rubber, vulcanized or thermoplastic Preparation of samples and test pieces Part 1: Physical tests. ISO 9691:1992, Rubber Recommendations for the workmanship of pipe joint rings Description and classificatio
36、n of imperfections. w w w . b z f x w . c o m EN 682:2002 (E) 6 3 Classification Five categories of material for seals are specified in Tables 2 and 3. A nominal hardness shall be specified within the ranges in Table 1. Table 1 - Hardness categories Hardness category5060708090 Range of hardness, IRH
37、D46 - 5556 -6566 - 7576 - 8586 - 95 4 Requirements 4.1 Materials The materials shall be free of any substances which can have a deleterious effect on the life of the seals, or on the pipe and fittings. 4.2 Finished seal requirements 4.2.1 Dimensional tolerances Tolerances shall be specified from the
38、 appropriate categories in ISO 3302-1. 4.2.2 Imperfections and defects The seals shall be free of defects or irregularities which could affect their function. Classification of imperfections shall be according to ISO 9691:1992 as follows: - surface imperfections in zones involved in the sealing func
39、tion as described in 4.1.1 of ISO 9691:1992 shall be considered as defects; - surface imperfections in zones not involved in the sealing function as described in 4.1.2.1 b) of ISO 9691:1992 shall not be considered as defects. NOTE 1Major surface imperfections in zones not involved in the sealing fun
40、ction as described in 4.1.2.1 a) of ISO 9691:1992 can be considered as defects. This should be agreed between the interested parties; the acceptance criteria depends upon the seals type or design respectively. NOTE 2Internal imperfections as described in 4.2 of ISO 9691: 1992 can be considered as de
41、fects. The compressive force can be determined according to ISO 7743. The acceptable limiting values of the compressive force should be agreed between the interested parties; they depend upon the seals type or design respectively. w w w . b z f x w . c o m EN 682:2002 (E) 7 4.2.3 Hardness When deter
42、mined by the micro-test method specified in ISO 48, the hardness shall conform to the requirements given in Tables 2 or 3. NOTEIf the dimensions of a seal are appropriate, the normal test method specified in ISO 48 can be used, provided that the micro-test method is used for reference purposes. For
43、the same seal, the difference between the minimum and maximum hardness values shall not be more than 4 IRHD. Each value shall be within the specified tolerances. 4.2.4 Tensile strength and elongation at break Tensile strength and elongation at break shall be determined by the method specified in ISO
44、 37. Dumbbell shaped test pieces of types 1, 2, 3 or 4 shall be used. Type 2 is the preferred type. The test report shall state the dumb-bell type whenever type 2 is not used. The tensile strength and the elongation at break shall conform to the requirements given in Tables 2 or 3. 4.2.5 Compression
45、 set in air 4.2.5.1 General If the test piece is taken from a seal, then the measurement shall be carried out as far as possible in the direction of compression of the seal in service. 1.1.1.2 Compression set at 23 C and 70 C When determined by the method specified in ISO 815, at 23 C and 70 C using
46、 the small type B test piece, the compression set shall conform to the requirements given in Tables 2 or 3. 4.2.5.3 Low temperature compression set at ? ?5 C When determined by the method specified in ISO 815 using the small type B test piece and a recovery time of (30 3) min, the compression set af
47、ter 72 h at -5 C, when measured at -5 C, shall conform to the requirements given in Tables 2 or 3. 4.2.6 Accelerated ageing in air Test pieces prepared for the determination of hardness (see 4.2.3) and for the determination of tensile strength and elongation at break (see 4.2.4) shall be aged in air
48、 at 70 C for 7 days by the normal oven method specified in ISO 188:1998 (Method A). The changes in hardness, tensile strength and elongation at break shall conform to the requirements given in Tables 2 or 3. 4.2.7 Stress relaxation in compression The stress relaxation shall be determined by Method A
49、 of ISO 3384:1999, using a test piece in accordance with 5.1, after applying mechanical and thermal conditioning. Measurements shall be taken after 3 h, 1 day, 3 days and 7 days for the 7 days test and after 3 h, 1 day, 3 days, 7 days, 30 days and 90 days for the 90 days test. The best fit straight line shall be determined by regression analysis using a w w w . b z f x w . c o m EN 682:2002 (E) 8 logarithmic time scale. The 7 days and 90 days requirements in Tables 2 and 3 are those derived from these straig